util: move IP stuff from util.[ch] to ip.[ch]

Introduce ip.[ch] file to encapsulate IP protocol handling functions and
structures.  Modify various files to include the new header ip.h when
it's needed.

Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Message-ID: <20240303135114.1023026-5-lvivier@redhat.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>

1 files changed, 0 insertions, 55 deletions

diff --git a/util.c b/util.c
index 81449b7..bac5a53 100644
--- a/util.c
+++ b/util.c
@@ -32,61 +32,6 @@
 #include "packet.h"
 #include "log.h"
 
-#define IPV6_NH_OPT(nh)							\
-	((nh) == 0   || (nh) == 43  || (nh) == 44  || (nh) == 50  ||	\
-	 (nh) == 51  || (nh) == 60  || (nh) == 135 || (nh) == 139 ||	\
-	 (nh) == 140 || (nh) == 253 || (nh) == 254)
-
-/**
- * ipv6_l4hdr() - Find pointer to L4 header in IPv6 packet and extract protocol
- * @p:		Packet pool, packet number @idx has IPv6 header at @offset
- * @idx:	Index of packet in pool
- * @offset:	Pre-calculated IPv6 header offset
- * @proto:	Filled with L4 protocol number
- * @dlen:	Data length (payload excluding header extensions), set on return
- *
- * Return: pointer to L4 header, NULL if not found
- */
-char *ipv6_l4hdr(const struct pool *p, int idx, size_t offset, uint8_t *proto,
-		 size_t *dlen)
-{
-	const struct ipv6_opt_hdr *o;
-	const struct ipv6hdr *ip6h;
-	char *base;
-	int hdrlen;
-	uint8_t nh;
-
-	base = packet_get(p, idx, 0, 0, NULL);
-	ip6h = packet_get(p, idx, offset, sizeof(*ip6h), dlen);
-	if (!ip6h)
-		return NULL;
-
-	offset += sizeof(*ip6h);
-
-	nh = ip6h->nexthdr;
-	if (!IPV6_NH_OPT(nh))
-		goto found;
-
-	while ((o = packet_get_try(p, idx, offset, sizeof(*o), dlen))) {
-		nh = o->nexthdr;
-		hdrlen = (o->hdrlen + 1) * 8;
-
-		if (IPV6_NH_OPT(nh))
-			offset += hdrlen;
-		else
-			goto found;
-	}
-
-	return NULL;
-
-found:
-	if (nh == 59)
-		return NULL;
-
-	*proto = nh;
-	return base + offset;
-}
-
 /**
  * sock_l4() - Create and bind socket for given L4, add to epoll list
  * @c:		Execution context